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Totok Sulistyo
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Civil Engineering Dept, Balikpapan State Polytechnics Office : Jalan Soekarno-Hatta Km.08 Balikpapan 76126 Telp. (0542)860895, 862305 Fax. 861107 web: sipil.poltekba.ac.id email. admin@ojs.poltekba.ac.id
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INDONESIA
Nusantara Civil Engineering Journal
Published by Politeknik Negeri Balikpapan
ISSN : -     EISSN : 2828612X     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Nusantara Civil Engineering Journal is the open-access peer-reviewed journal of civil engineering and environment. This journal is published by the Department of Civil Engineering, Balikpapan State Polytechnics, it has scopes and focuses in: 1. Road & Bridge Construction 2. Transportation System 3. Structure 4. Geotechnics 6. Construction Management 7. Material Technology 8. Hydrology & Environment 9. Hydraulic 10. Architecture & Urban Planning 11. Geomatics, Photogrammetry & GIS
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 55 Documents
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Engineering Performance and Cost Evaluation of PET and LDPE-Based Plastic–Sand Interlocking Blocks for Sustainable Construction Dauda Ali; Auwal Shuaibu
Nusantara Civil Engineering Journal Vol 5 No 2 (2026): Nusantara Civil Engineering Journal (July - December 2026 - INPRESS)
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v4i2.721

Abstract

The increasing accumulation of plastic waste and the rising cost of conventional construction materials have necessitated the development of sustainable alternatives. This study investigates the production, performance, and economic viability of interlocking paving blocks made from waste Polyethylene Terephthalate (PET) and Low-Density Polyethylene (LDPE) combined with sand. Plastic waste sourced from residential areas, campuses, and waste centers was processed and used as a complete binder in a plastic–sand composite at a ratio of 1:3. The produced blocks were tested for compressive strength and compared with conventional concrete interlocks. Results show that PET-based blocks achieved an average compressive strength of 4.65 N/mm², while LDPE blocks recorded 3.56 N/mm². A cost analysis revealed that plastic–sand interlocks are significantly cheaper (₦125 per unit) compared to conventional concrete blocks (₦195 per unit), representing a cost reduction of approximately 36%. The study demonstrates that plastic–sand interlocks offer economic, environmental, and waste management benefits, making them suitable for sustainable construction applications.
Optimizing daylighting and passive thermal comfort in office buildings: Muhammad Aminu Musa
Nusantara Civil Engineering Journal Vol 5 No 2 (2026): Nusantara Civil Engineering Journal (July - December 2026 - INPRESS)
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v5i2.736

Abstract

There is disagreement among numerous researchers regarding sustainable office building design especially for the ideal values of Daylighting and Passive Indoor Thermal Comfort (DPITC) in tropical countries like Nigeria. The study aims to develop a framework for a sustainable office building for optimum daylighting and passive indoor thermal comfort (DPITC) in the temperate dry climate of Nigeria. Using a quantitative experimental design with OpenStudio 3.3.0 simulation tools, the study compared closed-plan (double-banked) and open-plan office building prototypes in Jalingo, Zaria, and Abuja from January to December 2024. The open-plan design demonstrated statistically significant superiority over closed-plan designs across key metrics: Daylight Autonomy (45.7%, p < .0001), Useful Daylight Illuminance (55.2%, p < .0001), Spatial Daylight Autonomy (55.2%, p < .0001), and Relative Humidity (10.6%, p < .0001). Multiple regression analysis yielded a predictive equation: A = 170.87 - 512.232WWR + 49.41PF - 8.6R, enabling architects to optimize orientation (A), window-to-wall ratio (WWR), overhang projection factor (PF), and wall R-values for DPITC. The framework provides evidence-based guidance for sustainable office design in Northern Nigeria's temperate dry climate. Findings support the hypothesis that mean effects of DPITC are significantly different for at least one of the azimuths, WWR, overhang projection factors, and R-values of external wall materials in open-plan office buildings in this climate zone.
Pengaruh Perubahan Daerah Tangkapan Hujan Akibat Pengembangan Disposal terhadap Kebutuhan Kapasitas Sump Laela Oktalia Nur Firdaus; Tedy Agung Cahyadi; Muhammad Anggara Imam Tatowi
Nusantara Civil Engineering Journal Vol 5 No 2 (2026): Nusantara Civil Engineering Journal (July - December 2026 - INPRESS)
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v5i2.740

Abstract

Abstrak Kajian mengenai pengaruh perubahan daerah tangkapan hujan akibat pengembangan disposal terhadap kebutuhan kapasitas sump masih sangat terbatas, khususnya pada tambang emas terbuka di Indonesia. Penelitian terdahulu umumnya mengkaji aspek sistem penyaliran, sedimentasi, dan hidrologi disposal secara terpisah, sehingga belum terdapat kajian yang mengintegrasikan perubahan daerah tangkapan hujan akibat ekspansi disposal dengan evaluasi kebutuhan kapasitas sump secara komprehensif. Penelitian ini bertujuan menganalisis pengaruh perubahan daerah tangkapan hujan akibat pengembangan disposal terhadap debit limpasan, potensi sedimentasi, dan kebutuhan kapasitas sump Penelitian dilakukan menggunakan metode kuantitatif deskriptif berdasarkan data curah hujan periode 2016–2025. Curah hujan rencana dihitung menggunakan distribusi Gumbel, intensitas hujan dengan metode Mononobe, dan debit limpasan dengan metode Rasional. Daerah tangkapan hujan didelineasi menggunakan data Digital Elevation Model (DEM) melalui perangkat lunak Global Mapper, sedangkan potensi erosi dan sedimentasi dihitung menggunakan metode USLE dan pendekatan Sediment Delivery Ratio (SDR). Analisis menunjukkan bahwa pengembangan disposal menyebabkan perubahan distribusi daerah tangkapan hujan yang mengakibatkan dominasi aliran menuju sump eksisting dengan debit limpasan sebesar 16,81 m³/detik, dibandingkan 8,04 m³/detik pada sump baru. Potensi sedimentasi tahunan pada sump eksisting dan sump baru masing-masing sebesar 11.631 ton/tahun dan 8.189 ton/tahun. Perubahan daerah tangkapan hujan tersebut mengakibatkan kebutuhan kapasitas tampungan sebesar 218.856 m³ untuk sump eksisting dan 51.463 m³ untuk sump baru. Kebaruan penelitian ini terletak pada pendekatan integratif yang menghubungkan secara kuantitatif perubahan daerah tangkapan hujan akibat ekspansi disposal dengan evaluasi kebutuhan kapasitas sump sebagai acuan teknis perencanaan sistem penyaliran tambang yang adaptif terhadap perubahan topografi.
Integrative GIS-Based Mapping of Active Mining Sites, Exclusion Zones, and Potential Mining Areas in Southwestern Nigeria OLUWASEUN ELIZABETH FOLORUNSO; Segun Stephen Folorunso; Shadrack Ojodugbowa Omachoko
Nusantara Civil Engineering Journal Vol 5 No 2 (2026): Nusantara Civil Engineering Journal (July - December 2026 - INPRESS)
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v5i2.746

Abstract

Nigeria's mining sector was once a major driver of national economic growth during the 1960s and 1970s, but its prominence declined sharply following the rise of the crude oil industry, leaving it with a marginal GDP share of just 0.17% between 2018 and 2022. Reports from the Development Agenda for Western Nigeria Commission highlight that the country's Southwestern states possess rich mineral reserves such as gold, tin, zircon, rutile, feldspar, and quartz giving the region strong potential to emerge as a global mining hub. Realizing this potential, however, has been constrained by illegal mining operations, overlapping land-use claims, and a lack of reliable spatial data, all of which have undermined effective resource planning and revenue collection. In response, this study carried out a spatial mapping exercise to delineate zones suitable for mineral exploration and extraction, drawing on land use and land cover data to distinguish built-up settlements, licensed mining concessions, and legally restricted zones as defined under the Nigerian Minerals and Mining Act 2007. Findings show that of the region's total 78,771 km² landmass, 13,755.7 km² is already under licence, while 49,765.2 km² representing 63.2% of the area remains available for future mineral leasing. The analysis further identified 1,434 active mining sites, over half of which (759, or 52.9%) overlap with land designated for residential expansion, pointing to considerable spatial conflict. The study concludes that GIS-driven spatial analysis offers a robust tool for guiding licence allocation, land-use planning, and environmentally responsible mining development across Nigeria.
Feasibility constraints in public works price adjustment weighting in Nepal Prasanna Jibi Ghimire; Prerana Khatiwada
Nusantara Civil Engineering Journal Vol 5 No 2 (2026): Nusantara Civil Engineering Journal (July - December 2026 - INPRESS)
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v5i2.753

Abstract

Price-adjustment clauses distribute construction cost fluctuation between public employers and contractors, but the weighting intervals written in bidding documents do not necessarily provide the discretion they appear to provide. This study audited 31 official Nepal e-GP works documents and collapsed repeated designs into 19 distinct coefficient-range specifications. For each specification, the feasible combinations of labour, materials and equipment coefficients were derived under the contractual normalization constraint with a non-adjustable coefficient of 0.15. Seventeen specifications produced polygonal feasible regions, whereas two nominal interval sets collapsed to a single admissible weighting. Among polygonal specifications, feasible area in the labour-material coefficient plane ranged from 0.0012 to 0.0350, a 29-fold difference. Historical sensitivity was then evaluated for eight specifications whose index sources were compatible with Nepal Rastra Bank construction labour, construction materials and machinery/equipment series. Under the 2022/23-2023/24 annual-average movement, the broadest specification permitted a 1.810 percentage-point spread in the adjustment factor, equivalent to about NPR 1.81 million per NPR 100 million of adjustment-eligible work. The results show that coefficient normalization should be checked explicitly when drafting and evaluating price-adjustment schedules.

Page 6 of 6 | Total Record : 55

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